I just got this car from my wife's grandfather. No air will blow from the dashboard vents, only the Defrost Vents. Also, it won't blow any cold air though the AC Compressor is on and the system is charged.
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Re: Dashboard AC Vents don't work
Check the vent housing under dash it is vacuum controled most likley you got a line off or broken not allowing door inside to open worse case scenerio the acuator on it has gone out and needs replaced hope this helps
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Defrost has been stronger on all types. Just the way plenums are made. Clear that wind shield first. As long as you have plenty of heat to keep the cabin area warm to hot, it's OK. I wouldn't woory about it.
I think your problem is the head unit that selects where the air comes out ie. Face, floor, defrost, or hi-level face and floor. If that's not working then it will not let you switch location that you want the air to come out.
u have a loss of vacuum to the ac mode control switch, this switch applies vacuum to diff vacuum motors to move air to diff outlets, dash, floor, defrost etc. either the vacuum line or vacuum resivior at the engine is leaking or the mode control is leaking vacuum.
Maybe your dashboard vents are clogged, obstructed or stuck in close position somehow.
If not, check the air hoses that carry the cooled air to the main vents are not clogged, bent, ripped or simply detached. If its practical for you, check if they are correctly placed, clean and general conditions are ok if you can.
If above are not the issue, go to check outlets of the A/C unit, its filters for the possible reason.